Dennis T Ridgefield Park , NJ January 22, 2016 Appliance: General Electric Dishwasher CDW9380N20SS Ge Dishwasher Cdw9380n20ss: Not thoroughly cleaning dishes. How to replace Fine Filter Hub Nut. I disassembled the upper wash arm water supply tube and wash arms, inspected, and cleaned out the tube and water jets in those arms that were blocked with debris ( lemon and orange pits ). Installing the upper wash arm supply tube with the hub fitting required that I tighten the mating fitting from under the dishwasher . This was required because, when I installed the new tube and fitting in the machine the first time, the fitting was about a quarter to a third of a rotation too loose with the upper fitting lined up for the take off position for the water tube. So keeping the upper tube and fitting lined up while tightening the lower mating fitting ( above the motor) was the solution . I was going to use just the tube ( when I originally started the repair ) but I broke the white plastic retaining snap on the original hub fitting when disengaging the tube from the hub fitting. I was grateful that the new tube came with the hub fitting as an assembly. Also note that the original hub fitting was tight before I disassembled it. Thank you for your prompt delivery of the service parts and your service videos that showed what to expect when servicing this machine. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours